# Use lightweight Node.js 20 base image
FROM node:20-alpine as builder

# Set working directory
WORKDIR /app

# Copy package files separately for better Docker caching
COPY package.json package-lock.json ./

# Install dependencies
RUN npm install

# Copy entire project
COPY . .

# Build the Next.js app
RUN npm run build

# Use a minimal base image for running the app
FROM node:20-alpine

WORKDIR /app

# Copy built files from the builder stage
COPY --from=builder /app ./

# Expose port
EXPOSE 3000

# Start Next.js in production mode
CMD ["npm", "run", "start"]